Assert failure on 2.070.0 without stack trace

[Nordlöw via Digitalmars-d-learn]

After upgrading to 2.070.0 I get an assert failure in my 
application that wasn't there before:

core.exception.AssertError at knet/linking.d(235): Assertion failure

Why isn't there any stacktrace? I thought has been fixed.

Please help.